Posting this as its own thread because I missed her before I went to bed. Link to her official data for reference.

Update: SP Enhancements/Builds posted. Check here.

Silver Queen Gabriela

• Gabriela has exceptional HP (9645 up to 50% from SP) and great ATK at 4012. Her DEF still manages to be slightly over 3k, which is on the low end but not unbearable, while her REC manages an average-ish 3.3k.
• She's got an interesting set of arena capabilities - the chance-based angel idol is always good, and her 100% ATK boost after taking 5000 damage is sure to trigger on any turn she gets her angel idol to proc, meaning she can get a decent ATK boost and hit for a truckload of damage. Her high HP pool also heavily increases her survivability and being light element means she's particularly effective against Mifune if she survives his attacks.
• Her animation is a weird one.
  • Firstly, it's divided into two sets of hits (pretty normal). Each of the two sets of hits is on a different spark track, but the delays are all multiples of 3 within the sets. In other words, you'll need two spark blankets or a dupe to spark her properly.
  • The weird part of her animationis the extra attack on her SBB, each hit of which occurs eactly 1 frame before the matching hits on the second half of her SBB. This may cause some odd behaviour when playing with increased battle speed.
  • Oh, for the record, the single target hits will be sparked by the same spark blanket that gets the first half of her animation.
  • Our final note is that her animation is fairly long, and she's a teleporting unit - her buffs and damage are calculated about 34 frames after activating her BB/SBB (much slower than average movement speed units), which means you can't really rely on her HP->ATK conversion buffing a squad in OTKO scenarios.
    • OTK typically uses Avant who brings that anyway. Usually a non-issue or just a one-turn nuisance.

LS

• Gabriela's LS is a mixed bag of stats, healing when attacked and BC cost reduction. None of the effects are massively swingy in terms of squad damage or survivability, but there's a fair amount of utility here.
  • Firstly, the stats are 60% HP and 50% ATK/DEF/REC scaled to HP remaining. Honestly speaking there are OE that get these kind of stats without restrictions and generally better other LS factors (Ark anyone?) so it's a little disappointing.
    • Also, REC scaling n remaining HP is pointless without a convert - you don't get the extra REC to heal more when you're low on HP...
  • The heal when attacked is at pretty solid values. This kind of healing is best used in fights where there are lots of small attacks, as you're relying on random chance to even trigger it and units need to survive the initial damage before they get any healing.
  • BC cost reduction is one of the best forms of BC support at the moment as it's the only common one not affected by BC fill rate debuffs, and also scales some BB drain effects (and BB cashback, but that's becoming pretty rare due to unpopularity). It also allows 0 BC cost strategies, which Gabriela herself can benefit from.

ES

• An ES that seems primarily designed to make her an arena-viable unit, Gabriela's ES grants her 100% ATK for a turn after taking 5000 or more damage, a 40% chance to gain angel idol whenever she should be killed (up to twice per battle) and a 1005 chance to benefit from extra lifesteal on all of her attacks.
  • The ATK bost can be converted in content, so it's not just nice for turn 2 in the colloseum. In raids, it's pretty much permanent, too.
  • At the moment, chance-based angel idols can only be removed by the "No Extra Skills" rule in colloseum. This of course means any unit with this feature is viable, not to mention that Gabriela has a great ATK stat and a good counter-element to Mifune.
    • Not to mention these angel idols are also one of the only ways to survive certain enemy nukes in hard content if you screw up. Not perfectly relable for running away in raids, however.
  • The lifesteal effect is normally weak, but Gabriela's personal lifesteal is at a 100% chance and with her ATK stat and BB damage output, it will be rare to see her below full HP on any turn after she uses SBB/gets a lot of sparks with decent spark buffs.
    • This adds a complementary effect of her not stealing HC if she's at max HP, boosting overal squad healing for the rest of your units.
    • It also helps in the colloseum, as units which survive by chance-based angel idols don't typically end the fight on max HP unless they get a lot of HC drops, which puts your tiebreaker stats at risk.

BB

• A simple Light/Dark AoE which offers immunity to elemental damage, critical damage and stat debuffs for 1 turn, and heal-when-attacked for 3 turns.
  • Elemental immunity is great if you need it. You can build squads that aren't weak to the target element - or take a unit with this effect and do whatever you want. Especially useful for taking light/dark units to dark/light content respectively.
  • Crit immunity is extremely important when it matters and skippable when it isn't. You'll want to look up hard content in advance if you're unsure if you need this.
  • Debuff immunity exists mostly to prevent DEF reductions from hurting your squad. You're generally going to have a cleanser to prevent any ATK/REC reductions from being relevant beyond their impact on conversions.
  • Heal-when-attacked was discussed earlier. As a note, when you try to stack this effect, you don't get 20% chance 20% chance = 40% chance, and you don't get 205 heal 20% heal = 40% heal. Heal-when-attacked effects resolve individually - that means you have two 20% chances to heal, and each chance heals 20% of the damage dealt if it triggers (also, any combination can trigger - neither heals, one heals, both heals)
    • The buff doesn't stack with itself, obviously - I'm talking about it stacking with leader skills, ES, spheres and so on.
  • The biggest weakness of the BB is the short buff duration paired with none of the buffs being present on her SBB. There's an SP enhancement to fix this, but it's extremely expensive considering the sheer amount of viable options she has. If you don't take this option, Gabriela won't get many opportunities to use her SBB if you rely on her BB for the immunity buffs.

SBB

• A powerful nuking skill on this up-to-now mostly defensive/utility unit, Gabreila's SBB is an HP-scaled AoE nuke with a single target double attack. It adds an HP->ATK conversion and BC-when-attacked to the squad, and Gabriela also gives herself some self-ATK/DEF/REC buffs and heals based on the damage from the single target hit.
  • The scaling factor on the AoE is 700%, meaning it gains 70% BB ATK per 10% HP added. HP-scaled attacks, if you're not aware, effectively scale to "scaling factor x total HP%" such that a unit with 100% HP (200% total) gets double the scaling factor, and so on. With the minor downside that damage falls if the unit's at low HP, but it'll rarely go below an average unit's damage regardless.
    • In Gabreila's case, her Lord ATK combined with her flat ATK gives her a total of 4216 ATK when using this. This means she hits the damage cap at 2372% ATK. Between her self-buff (150%), base damage (300%) and common ATK/BB ATK buffs (550%) she already has 900%, meaning she just needs to get ~1470% more ATK to cap damage, which she'll hit at 110% HP (you'll blow past this with two leader skills and a sphere). Any more HP after that just adds an HP buffer before she starts losing damage due to losing HP.
    • This is before considering her HP->ATK conversion as well, which lowers the bar further. Probably to around 90% HP or so.
  • The single target portion of her damage is not HP-scaled - it's just a regular attack. However, as an extra attack it benefits fully from attack buffs, and scales a little from the breaker typing (as her AoE generally caps, the benefit from breaker is going to be a lower % of damage increase than a regular unit, however). Also of note is that there's a strong lifesteal effect attached to this part of the attack. It won't trigger in time to boost the AoE damage, but in a general scenario will fully heal Gabriela alongside her ES.
  • HP->ATK conversion is not the strongest convert, but it's not a defensive buff so it's not critically important to have the strongest version of it available. In this case we're looking at about 7k damage for more average units in an average scenario, which is about 200% ATK for said average units - similar to an 80% DEF->ATK conversion, but for many units it'll be slightly less. Not enough to matter, though.
  • BC-when-attacked is a squad staple. It doesn't matter in OTKO content, but Gabriela's viable enough in other content that you might find yourself slotting her for it, especially if you take a utility build instead of a damage build.
  • Gabriela's self-buffs are the type that stack with regular ATK/DEF/REC buffs, so she'll reach an exceptional amount of DEF. The ATK boost also helps her single target attack a lot, but in many situations won't really be relevant to the HP-scaled AoE.
  • Gabriela's biggest weakness as a nuker is the lack of damage multipliers in her SP enhancements - the only one she has cannot trigger on turn 1. This means she's not really comparable to Rize and Toki if all you care about is the damage - but she does provide a lot of utility compared to them.

UBB

• Finally, we see Gabriela's UBB. It's an HP-scaled nuke which offers huge BC-when-attacked and HP->ATK buffs, a 100% heal when attacked effect and a chance-based angel idol effect.
  • The HP-scaling is practically irrelevant as she'll generally cap damage here if she's even at 8k HP remaining (less after buffs). But if the damage cap ever gets lifted, it'll become really impressive.
  • The BC-when-attacked is standard for a UBB. It'll generally protect your squad from most BB drain and fill any unit that takes damage for the 3 turns.
  • The HP->ATK conversion, at 60%, is going to be worth around 400-600% ATK depending on the unit. Unfortunately it can't be re-converted to DEF, but damage si damage.
    • I think it'll be weaker than some DEF->ATK UBB, but the damage buff from this UBB is secondary to everything else.
  • 100% HP when attacked is basically "100% mitigation against attacks which your squad can survive". It won't trigger if a unit dies from a single attack, or dies to a second attack before the healing from the first attack triggers. This behaviour makes it more reliable for raids and multi-enemy trials/GGC, rather than major single bosses.
  • The chance-based angel idol buff is a wonderful little thing that, while not totally reliable, doesn't seem to be affected by buff wipes (similar to the HP increase buff). This makes it particularly powerful, though do note that the icon will display even if the buff is a dud. You won't know if a unit actually has the angel idol until it's too late to change anything - though at 80% it should ensure the survival of most of your squad if you're using it to survive a specific attack.
    • And then the heal-when-attacked will trigger on the survivors and it'll be like the attack never happened, unless you were buff-wiped first. So check if your units' angel idol buff icons were removed - you won't be able to tell by looking at their HP if there was no buff wipe.

Pre-SP, Gabriela's a weird thing that chooses between nuking and defensive buffs, because you can't maintain her more important defensive buffs and use her SBB at the same time. Post-SP, you can choose to have your defensive buffs and eat the enemies too. or something like that. It comes at a cost, but you can still get a couple decent enhancements with what's left.

Her nukes are less effective than the current toppest tier units, but she's still very strong damage-wise. As a nuke she'll stil carry a lot of utility - her nuke build leaves open a lot of SP for utility enhancements, and she gets a lot of those, which we'll cover later. Still, I think her overall package doesn't earn her a slot in FG/FH at the moment - she's more a raid/trial viable nuker.